The three treasures of Weihai specialty are Rongcheng kelp, Weihai sea cucumber and Weihai peanut. Weihai is a prefecture-level city in Shandong Province, an important marine industrial base and a coastal tourist city in China. Rongcheng Kelp: It is a specialty of Rongcheng, the easternmost part of Shandong Peninsula, and is known as "the hometown of kelp in China". The kelp culture area in Rongcheng area is100000 mu, with an annual output of more than one million tons of fresh kelp, ranking first in the country. The average annual output of kelp accounts for 80% of the total output in the province and more than 40% in the country. This is a product with significant geographical advantages.

Stichopus japonicus in Weihai: It originated from the shallow sea and artificial ponds along the coast of Weihai, and distributed in various coastal areas of Huancui District, Rongcheng City, Wendeng City and Rushan City. Its unique geographical location and superior natural conditions are very suitable for the growth of high-quality sea cucumber.

There are many rocky reefs along the coast of Weihai, with dense algae and rich saprophytic debris, so the sea cucumber produced is big, thick, tender and delicious.

Weihai Peanut: Weihai is the main peanut producing area and one of the largest peanut export bases in China, with a long history of peanut planting. Due to the superior natural resources such as soil, light, heat and gas and cultivation and management conditions, the peanut skin produced in Weihai is white, full of grains, bright in color, delicious, fragrant, sweet, crisp and not greasy.